Trying to decide whether to go after the 15 or 10.  One of the factors killing me is the effective range of the rounds (estimated).  And off the subject slightly, with no flash hider, is there A LOT of flash at night?  How about with a hider?  
Thanks.

There are no new 10s available with flash suppressors because they are all post-bans.  Flash is largely a function of ammo, for instance, PMC will light up the night with no flash suppressor, other brands won't.  Experiment.  Flash suppressors do work, and I wouldn't want a rifle without one for "serious business."  That limits you to a pre-ban 15.

Also you will have to be a much richer man to get set up with a 10 because the mags are so damned expensive.

As far as range, both will reach out there.  The 10 will just hit much harder at long range.

Any other thoughts and or opinions?

The AR10 starts where the AR15 quits. You just must decide how far you want to shoot.

another question is ability I know the ar15 is good enough for me I don't think i will be engaging targets much past 600m.

john

My answer is to own BOTH!  If you can only have one... GET THE AR-15!  I say this beause of universal parts, uppers, magazines, cheap ammo, and ballistics that are quite capable out to 500-yards or even furtther for the AR-15.

The AR-10 is a great second rifle because of the extra power but in general I think the AR-15 is the more versitle and adaptable weapon system in the world.  The AR-10 isn't like that because of limited uppers and configurations!

Quoted: My answer is to own BOTH!  If you can only have one... GET THE AR-15!  I say this beause of universal parts, uppers, magazines, cheap ammo, and ballistics that are quite capable out to 500-yards or even furtther for the AR-15. The AR-10 is a great second rifle because of the extra power but in general I think the AR-15 is the more versitle and adaptable weapon system in the world.  The AR-10 isn't like that because of limited uppers and configurations!

I attend to agree here if you want punching power for deer you could get a tromix upper for your ar15 for knockdown power. but i want a ar10
myself i would get both.

Me personally would get a pre-ban AR15. Then for the .308, get a nice bolt action sniper rifle.

Twisting your original question a little, the .308 is much more effective than a .223 at any range.  All .30 cal. bullets have a higher BC of similar shaped .224 cal. bullets due to their greater mass, hence they will fly flatter, farther and scrub off less velocity.  

They will also have have much more energy given the same velocity.  The .223 has less recoil, affords quicker follow up shots and has benifits for engaging multiple targets in rapid succession.  My AR10 seems to have less recoil than my M1A but substancialy more than any AR-15 I own.

The .308 or 7.62 NATO is still a very popular cartridge world wide.  If it was down to one rifle I would go with the .308 and of the .308s I have I would take the AR10.

C'mon, we all know you're going to end up with both rifles and so do you... I would say buy good-used and get whichever one is the first opportunity buy (good price). Pick up the other one when another opp. presents itself!

I shot 1,000 yards Sunday with my .308. Loaded up 50 rounds of 168 gr. Saturday night just for the shoot.
Two guys tried to get me on paper. They could not see where I was going. After 20 rounds one of the guys asks "what weight"? When I said 168 he said "they will not go 1,000 yds.
A guy on the end position was putting his 80 gr .223 shot from his AR15 Service rifle on paper. I don't know how much hurt those .223 80 gr had at 1,000 yds but he was hitting what he was aiming at.

Funny thing about those 168s.  They go sub-sonic before 1000 yards.

Switch to 155s or 175s and you'll be good for the go.

Get an M1 Garand and a preban AR15.  Put a t37 military surplus flash hider on the Garand.  It is .30-06, so it shoots farther than .308 or .223, is semiauto, and you can legally put the t37 on.  It just screws on in place of the gas cylinder lock.  I have 2 all GI Garands and a third one that had a match barrel on it when I got it.  Since it wasn't original, it wasn't too much of a sacrilege put a B-Square mount and scope on it along with the t37.  Works great.  I can shoot 3-4 inch groups at 300m and I ain't that great a shot.

I prefer the AR configuration, but have never been a real fan of .308.  Combine that with the fact that you can't get a preban AR10 for the flash hider and thus my recommendation for the .30-06 Garand.  For an old gun, they still shoot sweet and are still less expensive than an AR10 or a preban M1A that you can put a flash hider on.  Also have a .223 bolt and .30-06 bolt and am having flash hiders put on both, which is legal since they aren't semiauto.  I got the 2 bolts in those calibers to match the ammo I already use.

LarryG finally admits he ain't that great a shot!!!

Hey Larry!  How're you doing?  By the way, 3 to 4 inches at 300 with an M1 ain't bad at all.

Quoted: LarryG finally admits he ain't that great a shot!!! Hey Larry!  How're you doing?  By the way, 3 to 4 inches at 300 with an M1 ain't bad at all.

Whatchu mean FINALLY????  I never claimed to be.

Leaving on Sunday for 3 months in the Caribbean, doing some telecom system upgrades.  Don't know if I will have internet access down there.

That is with a match barrel and a scope.  I fired some tracers at a paper target at 25 yds on initial Zeroing and caught the paper on fire when the round apparently hit something in the backdrop and richoceted back into the target.  I didn't expect that!